Barking-drum.



E. HUTCHINS.

BARKING DRUM.

APPLICATION FILED MAR. 26, 1915. 1,300,730,, Patented Apr. 15,1919.

3 SHEETS-SHEET I.

E. HUTCHINS.

BARKING DRUM. APPLICATION FILED MAR. 26. 1915.

test:

BHUTCHINS. BARKINGDRUM.

APPLlCATlON FILED MAR. 26.1915- 7 1,300,730, Patented Apr. 15, 1919.

3 SHEETSSHEET 3.

INLET nrran states I Parana onnro.

IEDVVAZRJ.) HUTGHIN'S, OF MONTCLAIR, NEW JERSEY, ASSIGNOR T0INTERNATIONAL PAPER COMPANY, A CORPORATION OF NEW YORK.

EARRING-DRUM.

Specification of Letters Patent. Patented Apr. 15, 1919.

Application filed March 26, 1915. Serial No. 1 7,102.

at Montclair, in the county of Essex and State of New Jersey, haveinvented certain new and useful Improvements in Barking- Drums, of whichthe followingis a specification, reference being had therein to theaccompanying drawing.

This invention relates to means for thelLI'BBJtIIlBIl'D of wood, in theconversion of the same into pulpfor use in the manufacture of paper, andit has reference more particularly to that stage of the operation inwhich the bark is removed from the wood. .For this purpose it is thecommon practice to employ a rotary dru-m known as a barking drum,inwhich chunksof wood are placed, the impact of the chunks against eachother and their attrition, due to the rotary motion of' the drum, actingto loosen and detach the.

bark, which escapes through openings in the drum, while the bark-freedWood is discharged separately therefrom. Further, it is the commonpractice to partially submerge the drum in atank of water, so that thewater will be mingled with the wood in the drum and facilitate thebarking operatlon.

My invention consists of various improvements in devices of thischaracter, which improvements are directed more particularly to the formand construction of the drum; to the manner of mounting the same.

in relation to the tank; to the means for supplying the wood and waterto the drum to the end that the operation may be continuous and withoutinterruption;-to the manner of feeding the wood to the drum; to the formof the tank and its relation to the receiving and discharge ends of thedrum; to the means for removing the bark from the tank; and to various.otherfeatures of construction, which will be pointed out in thespecification.

In the accompanying drawings I have illustrated my invention in one formby way of example, but it will be manifest that the same may bevariously changed and modified by the skilled mechanic without departingfrom the spirit of the invention; and further it will be understood thatthe invention is not limited to any particular form or construction ofthe parts except in so far as such limitations are specified intheclaims.

In the accompanying drawings:

Figure 1 is a top plan view of a barking drum having my inventionembodied therein.

Fig. 2 is a vertical longitudinal sectional elevation on the line aa.

Fig. 3 .is a transverse sectional elevation on the line bb of Fig. 1.

Fig. 4 is an elevation of the receiving, end of the drum on an enlargedscale.

Figl 5 is an elevation of the discharge end of the drumon an enlargedscale.

Fig. 6 is a longitudinal central section through the drum showing theretarding members therein.

Fig. 7 is a fragmentary sectional elevation through the receiving end ofthe drum and the adjacent wall of the tank showing the'water-tight jointbetween the two.

Fig. 8 is a sectional elevation on the line c c of Fig. 3, showing thewater-tight joint between the tank wall and the discharge end of thedrum.

Referring to the drawings:

1 represents a horizontal rotary cylindrical drum open at two ends sothat the wood to be barked may be introduced into its receiving end anddelivered from its discharge end. This drum which may be of any suitableand appropriate material is in the present instance imperforate for themain portion of its length, While for the remainder of its lengthadjacent its discharge end it is provided with circumferentiallyextending slots 1 through which the bark,

branch 3*, a vertical paddle wheel 5 being" mounted for rotation in thelongitudinal portion of the tank to produce a circulation of the waterthrough the drum and tank.

The drum is so supported that it may be rotated about its longitudinalcentral axis.- In the present instance the supports comprise two, pairsof supporting rolls 6,

mounted in suitable bearings sustained by a ,the adjacent parts, andtherefore there will be no liability or danger of rust or corrosion ofthe parts. Rotary motion may be imparted to the drum in any well knownand appropriate manner and from any suitable source of power. In thepresent instance I employ an electric motor 9, sustained by a platform10 extending over the longitudinal portion .of the tank, which motorisbelted to a pulley 11 carried by a shaft 12 journaled in bearings on theplatform 10. The shaft has fixed to .it a pinion 13 meshing with a gear14 on a counter shaft 15 mounted in bearings n the platform, which shaft15 has fixed to it a pinion l6 meshing with a gear ring 17 fixed to andencircling the drum. By this system of gearing, the motor is speededdown so as to impart to the drum a comparatively slow rotary motion.

At the receiving end of the drum is an upright frame Work 18, havingfixedto its inner side a vertical plate 19 which extends across the openend of the drum, and is provided in its lower portion with perforationsor holes 20, as shown in Fig. l. These holes are in such position thatwater may flow therethrough and into the drum from the lateral branch 2of the tank, the latter being formed with a mouth 21 which is seatedaround the perforated portion of the plate 19 so that the water from thebranch of the tank will flow through themouth and the perforations inthe plate, and will enter the lower portion of the drum, as the latteris rotated with its receiving end in proximity to the plate. i

The mouth of the tank is ,formed with a curved shoulder 22, and the endof the drum is formed with an annular shoulder 23, which shoulders arearranged adjacent each other and in axial alinement, a fixed packingstrip 24 being sustained by the frame work,

and bearing against the said shoulders so as to form a water tight jointbetween them as shown in Fig. 7. In the rotation of the drum, theannular shoulder 23 moves in close frictional contact with the packingstrip and the latter effectually prevents the escape of the'water frombetween the mouth 21 and end of the drum, so that the water cannot reachthe supporting rolls 6 on which the drum is rotatably sustained andadjacent parts.

The lateral branch 3 of the tank is provided with an outer wall 25 andan inner wall 26, which latter is formed with a curved seat 27 in whichthe drum extends, so

that the slotted portion of the drum will be shown clearly in Fig. 8. Inthe rotation of the drum, the annular shoulder 27 b thereon moves inclose frictional contact with the packing strip and the latter seatsclosely against the external surfaceof the shoulder 27 so that the jointthus formed will prevent such water as may find its way over the curvededge of the tank, from reaching the tank-supporting rolls 6.

. From the construction described, it will be noted that the "tank beingsupplied with water up'to the level indicated in Figs. 2 and 3, it willflow into and occupy a. like level in the drum, the effect being tosubmerge the lower portion of the drum, without the objectionablecondition which has heretofore existed of the water contacting with therotary supports for the drum, in the present instance the journals ofthe supporting rolls 6 and adjacent parts. 1

The paddle wheel '5, before alluded to, is rotated in such direction,(as indicated by the arrow in Fig. 2) that a circulation of the waterwill be produced in the tank toward the receiving end of the drum and inthe drum in a direction from the receiving to the discharge end. Thepaddle wheel may be driven in any suitable and appropriate manner, inthe present instance it being provided with a pulley 29 belted to apulley 30 on a horizontal transverse shaft 31 mounted in hearings on theplatform 10. The shaft is provided with a bevel gear 32 driven by abevel pinion 33 on the end of the shaft 12 before alluded to.

tents of the drum will gradually advance toward its discharge end, thebark escaping laterally through the slots near the end of the drum,while the bark-freed wood is de livered from the end of the drum, thewood and bark entering the lateral branch 3 of the tank. Duringthisaction a constant circulation of the water is maintained in thelower portion of the drum, the water entering the receiving end from thelateral branch 2- of the tank, whence it will flow through the lowerportion of the drum and will escape with the bark and bark-freed wood.into the lateral branch 3 of the tank.

I propose to feed the wood continuously into the receiving end of thedrum so that the. barking operation may be carried on withoutinterruption. For this purpose I prefer to employ a supply conveyer inthe form of a trough 34 leading upwardly to a point above the framelS.Arranged in the bottom of the trough is an endless conveyer chain 34provided with suitable cleats or lugs to engage the chunks of wood, theupper end of the chain passing around a sprocket wheel 35 mounted insuitable bearings sustained in the frame .18. This conveyer deliversinto a transversely extending trough 36 sustained above the frame 18 andinclined at its bottom so as. to deliver into a feed hopper 37. The feedhopper 37 is mounted fixedly in. the frame 18 and has its inner delivery end in position to discharge into the drum at the down-going sideof the same, the hopper being so inclined from the vertical that thewood will enter the drum in the general direction of the movement of themass of wood therein; whereby'there will be no' clogged at danger of thechunks becoming the delivery end of the hopper. This feeding hopper isof general rectangular form in cross section, its delivery end beingseated in an opening in the vertical plate 19, and the wood delivered tothe trough 36 by the supply conveyer, will be directed by said troughinto the hopper, and from the hopper will enter the down-going side ofthe drum in a direction inclined forwardly and transversely.

i The bark escaping through the slotted end of the drum will accumulateon the tank bottom, and in order that it may be preventedfromaccumulating in such quantities as to interfere with the operation ofthe drum, and in order that the bark may be recovered for use, I proposeto provide means for continuously removing the bark from the tank anddischarging the same therefrom. This operation is efi'ected as shownmore particularly in Fig. .3, where" it will be seen that an endlessconveyer device is arranged to scrape over the bottom of the tank andpositively emove and deliver the bark therefrom. This scraper deviceconsists of two parallel endless chains 38 connected at intervals bytransverse scraper blades 39, which chains pass over upper guidingsprocket wheels 40, lower sprocket wheels .41, and an intermediate. sidesprocket wheel 42, thesaid sprocket wheels being so disposed that I bedelivered over the side of the tank. The

upper guide-sprocket wheels are journaled in an upright frame structure43 at the discharge end of the drum. The lower sprockets are mounted insuitable bearings at the bottom of the lateral branch of the tank, whilethe side sprocket is mounted in bear ings on the platform 10. Theconveyer device is operated continuously in any suitable manner and fromany suitable source of power.

The point of the discharge of the bark-.

freed wood from the drum may be varied, in order that the passage of thewood through the drum may be made slower or faster according to theconditions encount'ered in practice. For certain kinds of wood, agreater period of time is required for the removal of the bark, whilewith other kinds of wood the bark is freed more speedily. By raising orlowering the discharge opening, the passage of the wood through the drummay be correspondingly retarded or hastened. This object may be efiectedby providing a cover plate 45 fixed to the frame structure 43, so thatthe plate will lie close to the open end of the drum, as shown in Fig.5.. A vertical opening 46 is formed in the plate 45, the sides of whichopening are provided with guideways 47, in which is mounted to move upand down, a slide 48 adapted to be moved vertically in its guide ways,and may be positioned at different points in the vertical height of thedrum, so as to correspondingly vary the position of the dischargeopening in a vertical direction, and in this manner control the passageof the wood through the drum in the barking operation.

The spout 50 discharges onto an inclined plate 60 sustained by the framework 43, which directs the wood against a deflector plate 61, which inturn deflects it inwardly and downwardly into the tank. As the woodenters the tank, it may be directed by a workman standing on a platform10, with the aid of a pole onto a conveying device 62 extending downinto the water, by which conveying device it is carried away.

In order that the chunks of wood which are not completely freed of thebark may be returned to the drum for further operation, I provide areturn conveyer 63 consisting of an endless chain with conveyer cleatsor lugs, fixed thereto at intervals and traveling in the bottom of atrough 64 leading upwardly from the end of the branch 3 of the tank tothe trough 36, into which the conveyer discharges, the wood delivered tothe trough being directed by the latter into the feed hopper 37. Thechain travels over a lower sprocket wheel 65 suitably mounted at theside of the drum near its discharge end, and over an upper sprocketwheel 66 sustained by the frame work 18 adjacent the receiving end ofthe drum, the said chain being driven continuously in any suitablemanner and from any suitable source of power. Such chunks of wood as arenot completely freed of the bark will be directed by the workman on theplatform 10*, by means of a pole, onto said conveyer chain of theconveyer 63.

In order that the wood may be retarded in its passage-through the drum,I propose to provide the same on its interior with'a series of retardingdevices in the. form of transverse partitions A arranged at intervalsthroughout the length of the drum, with central openings to permit thewood to pass therethrough, these partitions with the openings forming ineffect inwardly extending annular ribs. The openings in the partitionsat the receiving end of the drum are greater in diameter than those atthe discharge end, the said openings gradually de creasing in diameteras the discharge end is approached. The purpose of this particularconstruction is to cause the mass of wood .to gradually approach thetransverse center other, will, by their impact and attrition,

of the drum in its advance therethrough.

detach the bark, which will escape through the slots in the end of thedrum, while the bark-freed woodiwillbe deliveredthrough the dischargeopening, and the wood and bark will enter'the lateral branch 3 of thetank,

' the bark being continuously removed and strained of its water anddelivered over the side of the tank, while the wood will be carrupted,the wood being continuously fed to the drum, the Water beingcontinuously circulated therethrough, the bark and wood beingcontinuously discharged from the drum, and the bark being continuouslyremoved from the tank.

In regard to the feature herein disclosed of continuously feeding thewood to be barked into the receiving end of thedrum while at the sametime inducing a continuous fiow of the water axially through the drum, Ilay no claim herein broadly to this feature as it is claimed broadly ina copending application of Ambrose H. White,

filed March 26, 1915, Ser. No. 17084. The claims I make herein to thisfeature are directed to the return of the water escaping from thedischarge end of the drum to its for effecting a flow of water axiallythrough the drum from its receiving end toward its discharge end, saidlatter means operating to return the water discharged by the drum, toits receiving end and to circulate it through the drum as a continuousbody inside and outside the drum, said drum operating in its rotation toremove the bark from the wood and deliver the barked wood continuously.

2: In a mechanism for barking wood, the combination of a tank containinga body of water, a horizontal rotary drum mounted outside said tank andcommunicating at its ends with the ends of the tank; whereby the WaterWill occupy a common level inside and outside the drum withoutcontacting with the exterior thereof, and means for circulating saidwater continuously through the tank and drum from the receiving end ofthe drum toward its discharge end.

' 3. A rotary barking drum having receiv ing and discharge ends,-an'dprovided on its interior with inwardly extending retarding partitionshaving openings therethrough for the passage of the wood, the openingsin the partitions adjacent the receiving end of the drum being largerthan those in the partitions adjacent the discharge end of the drum.

4:. A rotary barking drum having receiving and discharge ends, andprovided on its interior with inwardly extendingv retarding ried away bythe conveyer 62. Such wood partitions having openings therethrough forthe passage of the wood, said openings being of gradually decreasingsize from the rece1v ing end to the discharge end of the drum.

5. In combination with a water tank, a rotary drum having a perforateportion, said drum adapted to detach the bark from the and an endlessconveyer. movable in the tank,

under the drum and operating to remove the V bark from the tank.

7. In combination with a water tank, a rotar'y barking drum operable todetach the bark from the wood and to discharge the bark into the tank, ascreen, and a conveyer movable in the tank and cooperating With thescreen in advancing the bark thereover. '8. In combination with a watertank, 'a screen inclined upwardly from the bottom thereof,'a rotarybarking drum operable to detach the bark from the wood and discharge thebark into the tank, and a conveyer movableover the bottom of the tankand over the inclined screen, and acting to advance the bark thereover.

9. In combination with a water tank having two lateral branches, abarking drum mounted for rotation outside of said tank between saidbranches, in position to receive the water from one part of the tank,and to discharge the same into another part of the tank; whereby acontinuous circulation of waterthrough the tank and drum may beefiected.

10. In combination with a water tank hav- I ing two lateral branches, abarking drum mounted for rotation outside of said tank between saidbranches, in position to receive 'thewater from one part of said tank,and to discharge the same into another part of\the tank, and means foreffecting a circulation of the water through the tank and drum.

11. In combination with a water tank having two lateral branches, and aconnecting portion, a rotary barking drum having a receiving endcommunicating with one of the lateral branches to receive the waterthere from, and having its discharge end in posi tion to discharge intothe other lateral branch, and a device acting in the connecting portionof the tank to create a circulation of the water'through the tank anddrum.

12. In combination with a water tank having two lateral branches and aconnectg P 9 I'Otary barking drum having a receiving end communicatingwith one of the lateral branches to receive. the water therefrom, andhaving its discharge end in position to discharge into the other lateralbranch; whereby a continuous circulation of water through the tank anddrum may be efiected. I

p 1b. In combination with a water tank having two lateral branches and alongitudinal connecting portion, a barking drum mounted for rotationalongside the longitudinal portion of the tank, said drum having itsreceiving end in communication with one of the lateral branches toreceive the water therefrom, and having its discharge end in position todischarge into the other lateral branch, and means for circulating thewater a through said tank and drum.

14. In combination with a water tank having a latera branch providedwith a discharge mout a rotary barking drum having receiving end inposition to receive the waterflowing through said mouth, and a packingbetween the drum and mouth.

15. In combination with a water tank having a lateral branch providedwith a discharge mouth, and a peripheral shoulder, a rotating barkingdrum having its receiving end in position toireceive the water flowingthrough the discharge mouth, an annular axial shoulder on the drum inproximity to the shoulder on the mouth, and a packing strip bearing onsaid shoulders.

16. Incombination with. a water tank 'havinga lateral branch with innerand outer walls, a rotary barking drum extended at its discharge endacross the inner wall and discharging into said branch of the tank, anda packing between the said inner wall and the drum.

17 In combination with a water tank having a lateral branch with innerand outer walls, said inner wall being provided with a curved seat, arotary barking drum projecting at its discharge end across said innerwall, and extending in said seat, and a packing between the drum andseat.

18. In combination with a water tank having two lateral branches and aconnecting ortion, one of said branches having a disc arge mouth, andthe otherhaving inner and outer walls, a barking drum mounted forrotation alongsidethe connecting portion of the tank, with its receivingend in position to receive the water from the discharge mouth, and withits discharge end in position to discharge between the inner and outerwalls, a packing between the receiving end of the drum and the dischargemouth, and a packing between the drum and said inner wall.

19. In an apparatus for barking wood, the combination of a rotarybarking drum adapted to receive the wood to be barked in its receivingend and operating to deliver the same from its discharge end, and powereling conveyer extending from the discharge operated means acting toreturn chunks of end of the drum'to the receiving end in posi- 10 Woodtothe receiving end of the drum; tion to receive chunks of Wooddelivered 20. In an apparatus for barking Wood, 0 from the drum, andconvey the same to the the combination of a rotary barking drumreceiving end of the drum.

adapted to receive the Wood to be barked in In testimony whereof, I haveafiixed my its receiving end and operating to deliver signature. thesame from 1ts dlscharge end, and a trav- EDWARD HUTCHINS,

